Plastics coned disk



May 15, 1945. H. KERSHAW yPLASTICS coNED DISK Filed Nov. 13, 1945 2 Sheet-Sheet l May l5, 1945. H. KERsHAw 2,376,154

PLASTICS CONED. DISK I Filed Nov. 15, 1945 2 sheets-shet 2v Patented May 15, 1945 PLASTICS CONED DISK Henry Kershaw, Belleville, N. J., assignor to Speed-Jack Company, Belleville, N. J., a partnership composed of Herman A. Fenning and f Henry Kershaw Application November 13, 1943, Serial No. 510,196

(Ul. 'I4-230.17)

' 10 Claims.

My invention relates to improvements in a plastics coned disk, used in a' variable speed transmission gearing. Y I

In .thel variable speed l transmission gearing, shown in Patent 2,253,921, granted to V. H. Van Sant, a plurality of coned disks are shown, which are shiftable axially with relationy to each other to vary their effective diameters.v To increase the range of adjustment,' these disks are provided at their inner portions with spaced sets of teeth, the set of teeth carried bynne disk passing into the spaces between the vset ofv teeth carried by the other disk. These disks are formed of plastics such as Bakelite The set of 'spaced teeth on each disk usually constitutes aboutonethird or less of the area of the coned face of the disk. Due to this reduced area, these teeth Wear, due to the action ofv the belt.

In accordance with the present invention, the set or sets of teeth of the coned disk is covered with ak metal facing or covering, extending over the face of this disk, in whole or in part, andanc'hored to or imbedded in the'material of the plastics disk, so thatlthere can be no slippage between the disk and the facing or covering. In this manner, a hard face isl provided for the teeth, which will eliminate the wearing action referred to. l v

The facing or covering is applied to the plastics disk while the disk is being molded and before the same sets.

In the accompanying drawings forming a lartA Figure is a transverse section taken on line 5--5 of Figure 4,

Figure 6 is a similar view, showing two linings or coverings assembled in opposed relation, to

be applied to a double coned disk,

Figure 7 is av perspective View of the formed lining or covering.

Figure 8 is a central transverse section through the completed coned disk with the liningsk or coverings applied thereto, A

, Figure9 isa perspective view ofsame,

I Figure 10 is a detailed section taken .on line Ill-IU of Figure9,

Figure 11 is an enlarged section taken on line y II-II of Figure 1,

at their inner ends.

Figure 12 is a similar View taken on line |2-l2 of Figure 9, and, 'A

Figure 13 is a transverse section through a completed disk, showing a slight modification of the invention.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral I5 designates a circular flat blank, preferably formed of sheet steel, which is case hardened after the forming operation. This blank is stamped to provide a central circular opening I6 and an annular set of radial openings I'I, having a set of radial openings I8 The openings IIl are wider than the openings Il. The openings Il form teeth covering radial sections I9, having inner extensions or ilanges 20, extending circumferentially. These flanges 20 are fcldable upon transverse lines 2l. The radial sections I9 are foldable upon radial lines 22 for providing radial flanges 23, and the blank is also foldable upon c ircumferentially extending lines 24, to form outer circumferentially extending anges 25. The blank is also foldable upon circumferentially extending lines 26` and upon an outer circumferential line 2l. The blank also'has small openings 28, stamped therein, preferably'arranged in radial groups. When the disk is nat, Figure 11, the openings 28 are cylindrical, but when the disk is formed into the coned facing or covering 29, these openings 28 become tapered, decreasing in diameter inwardly, Figure 12.

To form each facing or covering 29 from the blank l5, such blank is placed in a press and the radial anges 23 are bent inwardly and are arrangedl generally at a right angle to the teeth covering sections IS, but are preferably slightly inclined and converged outwardly, The inner flanges 20 are bent inwardly and cover the inner ends of the ilanges 23 and are disposed at an inclined angle with respect to thesections `I9 of about 30. The flanges 25 are bent inwardly and are preferably arranged at substantially a right angle to the sections I9. The blank is further pressed and formed to provide an annular body portion 30, which is coned and has an outer convexiace. The sections lconstitute continu ations of the annular body portion 30, while this body portion is bent inwardly upon the lines 26 and the outer ends of the lines 22, to form inwardly inclined circumferentially extending portions 3|, which carry the flanges 25. The blank is further bent upon the line 21 to provide an outer annular flange 32, which is inclined and preferably arranged at an angle of 30 to the body portion 30. After all of the bending or drawing operations are completed, the formed facing or covering 29 is then case hardened.

To produce a completed disk having two coned faces, two of the facings or coverings 29 are arranged in opposed relation, Figure 6, and suit. ably spaced in the mold. The plastics material such as Bakelite is introduced into the mold between the facings or coverings 29, and pressure applied to one or both of the facings or coverings to move them together and compress the plastics material. The mold is provided with suitable parts to form the teeth 33 and openings 34 and inclined walls 35 and the periphery 36. The plastics material is hardened under pressure, as is well known. The radial sections I9 cover the outer faces of the teeth 33, while the radial flanges 23 are imbedded in the sides of the' teeth and are flush with the surfaces of the same. The flanges are imbedded in the inner ends of the teeth 33. The flange 32 is imbedded in the annular body portion 36 of the formed plastics disk. The inclined portions 3l extend into the openings 34 and follow the inclined walls 35,

and are imbedded therein and are flush with the faces of these walls, The flanges are imbedded in the body portion 36', inwardly of and spaced from the high points 26, so that the shoulders produced by the same will not be engaged by the belts. The plastics material also enters the openings 28, Figure 12, and is anchored in these openings since they are tapered and increase in diameter outwardly.

It is thus seen that the annular body portion 30 covers the outerA annular portion of the body When the disk used has only one coned face the lining or covering is applied to only one face of the disk.

The coned disk thus produced is used in the variable speed transmission gearing sho-wn in Patent 2,253,921 and would be substituted for the disk 33 therein. Single faced coned disks having the lining or covering, would be substituted for the disks 28 and 4l. While my improved disk may be used in this organization, the invention is not necessarily restricted to` this use.

It is to be understood that the forms of my invention herewith shown and described are to be taken as preferred examples of the same, and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of my invention or the scope of the subjoined claims.

Having thus described my invention, I claim z.

1. A disk formed of plastics material and including a body portion having a central opening and provided with a set of spaced teeth surrounding the central opening and forming openings between the teeth, the outer portion of the body portion. andthe teeth forming a coned face, and a coned metallic facing, said facing comprising an outer portion to cover` the body portion outer portion and inwardly projecting radial sections to cover the teeth, said sections being provided at their inner ends with axially extending flanges imbedded in the inner ends of the teeth, the facing'outer portion being provided at its periphery with an axially extending flange imbedded in the disk body portion at its periphery.

2. A disk formed of plastics material and including a body portion having a central opening and provided with a set of spaced teeth surrounding the central opening and forming openings between the teeth, the outer portion of the body portion. and the teeth forming a coned face, and a coned metallic facing, said facing comprising an outer portion to cover the body portion outer portion and inwardly projecting radial sections to ocver the teeth, said sections being provided with. axially extending flanges imbedded in the teeth, the facing outer portion being provided with an axially extending flange imbedded in the disk body portion.

3. A disk formed of plastics material and including a body portion having a central opening and provided with a set of spaced teeth surrounding the central opening and forming openings between the teeth, the outer portion of the body portion and the teeth forming a coned face, and a coned metallic facing, said facing comprising an outer portion to cover the body portion outer portion and inwardly projecting radial sections to` cover the teeth, each section being provided with inwardly bent flanges at its longitudinal edges and which are imbedded in the edges of the tooth, each section being provided at its inner end with an axiallyl extending flange imbedded in the tooth, the facing outer portion being provided near itsperiphery with an axially extending flange imbedded in the disk body portion.

4. A disk formed of plastics material and including a body portion having a central opening and provided with a set of spaced teeth which surround the central opening and forming openings between the teeth, the outer portion of the body portion and the teeth forming a coned face, and a coned metallic facing, said facing comprising an outer portion to cover the body portion outer portion and inwardly projecting' radial sections to cover the teeth, said sections being provided at their longitudinal edges with axially extending flanges which are imbedded in the edges of the teeth, said sections being provided at their inner ends with axially extendingT inclined flanges which are imbedded in the teeth near their inner ends, the facing outer portion being provided with an axially extending in.- clined flange imbedded in the disk body portion.

5. A disk. formed of plastics material and including a body portion provided near its inner portion with a set of spaced teeth forming openings between the teeth, said openings having inclined bottom walls, the outer portion of the body portion and the teeth forming a coned face, and a coned metallic facing, said facing comprising an outer portion to cover the body portion outer portion and inwardly projecting radial sections to cover the teeth, said sections bein-g provided with axially extending flanges which are imbedded in the teeth, said facing outer portion being provided between the radial sections with inclined circumferential sections which are imbedded in the inclined bottom walls of said openings and. having axially extending flanges imbedded in said bottom walls inwardly of the high points of said bottom walls, the facing' outer portion being provided with an axially extending fiange imbedded in the disk body portion.

6.l A diskv `formed of plastics material and includinga body portion having a central opening and provided with` a set4 of spaced' teeth surrounding the central opening, the body portion' and teeth forming a coned face, and a coned metallic facing having van outer portion to cover the body portion and sections `to cover the teeth, said facing outer portion' and sections having parts imbedded in the body portion and teeth.

7. A disk formed of plastics material and inj cluding a body portion having a central opening and a setl of spaced teeth surrounding the central opening, the body portion and teeth forming a coned face, and a coned metallic facing to cover the body -portion and teeth, said facing havingfopenings forfthe passage of the `plastics posite faces with sets of spaced teeth forming openngs'i'between the teeth, said openings having bottom walls which are inclined downwardrly toward said central opening, the outer portion of the body portion and the sets of teeth forming coned faces, and a coned metallic facing forv each coned face, said facing comprising an outerportion to cover the body portion outer portion and inwardly projecting radial sections to cover the teeth, said sections having axially extending longitudinal flanges which are imbedded in the teeth and axially extending flanges at theirv inner ends which are imbedded in the teeth, ysaid facing outer portion being provided between the radial sections with circumferential sections` which are inclined downwardly toward the `central opening are imbedded in the i inclined bottom walls of said openings and having axially extending iianges at their inner ends which are imbedded in said bottom walls, the outer facing portion being provided with an axially extending iiange imbedded in the disk body portion.

10. A cone disk pulley formed of plastics material and including a body portion having a central opening and spaced radial teeth surrounding the lcentral opening, and metal strips applied to the faces of the teeth, said metal strips having openings, the plastics material being molded to the metal strips and passing into the openings, the body portion and teeth forming a coned face.

' HENRY KERSHAW. 

